used to show something might be true or happen, but you are not sure
She might be late, possibly because of the bad weather.
그녀는 늦을지도 모른다, 아마도 나쁜 날씨 때문일 것이다.
used with can or could to show strong feeling like surprise or annoyance
How could he possibly forget our anniversary?
그가 어떻게 우리 기념일을 잊을 수 있을까?
used with could to ask someone to do something in a polite way
Could you possibly help me with this heavy box?
이 무거운 상자 좀 도와주실 수 있나요?
used with can or could to show someone is doing their best to make something happen
I will try as hard as I possibly can to finish the work on time.
시간 내에 일을 끝내기 위해 가능한 한 최선을 다하겠습니다.
used with not to say strongly that something cannot happen or be done
You cannot possibly eat all that food by yourself.
당신 혼자서 그 모든 음식을 다 먹을 수는 없어요.